(19)
(11) EP 0 851 245 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.03.2000 Bulletin 2000/11

(43) Date of publication A2:
01.07.1998 Bulletin 1998/27

(21) Application number: 97122941.4

(22) Date of filing: 29.12.1997
(51) International Patent Classification (IPC)7: G02B 6/16
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 27.12.1996 JP 35069196

(71) Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Osaka-shi, Osaka 541 (JP)

(72) Inventors:
  • Kato, Takatoshi, c/o Sumitomo Electric Ind., Ltd.
    Yokohama-shi, Kanagawa 244 (JP)
  • Sasaoka, Eisuke, c/o Sumitomo Electric Ind., Ltd.
    Yokohama-shi, Kanagawa 244 (JP)
  • Ishikawa, Shinji, c/o Sumitomo Electric Ind., Ltd.
    Yokohama-shi, Kanagawa 244 (JP)

(74) Representative: Ritter und Edler von Fischern, Bernhard, Dipl.-Ing. et al
Hoffmann Eitle, Patent- und Rechtsanwälte, Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Dispersion-shifted fiber


(57) The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of 1,550 nm, a dispersion level of 1.0 to 4.5 ps/nm/km in terms of absolute value, a dispersion slope not greater than 0.13 ps/nm2/km in terms of absolute value, an effective core cross-sectional area not less than 70 µm2, and a transmission loss not greater than 0.25 dB/km with respect to light in a 1.55-µm wavelength band.






Search report